Loans and Allowance for Credit Losses for Loans - Summary of Activity in Allowance for Loan Losses (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Allowance for loan losses: | |||||
| Beginning balance | $ 584,500 | $ 578,200 | $ 583,400 | $ 558,850 | $ 558,850 |
| Loans charged-off | (27,626) | (42,071) | (47,427) | (86,090) | |
| Charged-off loans recovered | 5,580 | 4,242 | 7,837 | 6,312 | |
| Net (charge-offs) recoveries | (22,046) | (37,829) | (39,590) | (79,778) | |
| Provision (credit) for loan losses | 28,146 | 39,129 | 46,790 | 100,428 | |
| Ending balance | 590,600 | 579,500 | 590,600 | 579,500 | 583,400 |
| Commercial and industrial | |||||
| Allowance for loan losses: | |||||
| Beginning balance | 186,143 | 184,700 | 180,865 | 173,002 | 173,002 |
| Loans charged-off | (9,838) | (25,189) | (12,620) | (53,645) | |
| Charged-off loans recovered | 1,669 | 2,789 | 3,067 | 3,599 | |
| Net (charge-offs) recoveries | (8,169) | (22,400) | (9,553) | (50,046) | |
| Provision (credit) for loan losses | 20,936 | 11,115 | 27,598 | 50,459 | |
| Ending balance | 198,910 | 173,415 | 198,910 | 173,415 | 180,865 |
| Commercial Real Estate | |||||
| Allowance for loan losses: | |||||
| Beginning balance | 324,793 | 321,662 | 327,426 | 304,148 | 304,148 |
| Loans charged-off | (14,434) | (14,623) | (28,190) | (28,046) | |
| Charged-off loans recovered | 2,790 | 643 | 3,137 | 892 | |
| Net (charge-offs) recoveries | (11,644) | (13,980) | (25,053) | (27,154) | |
| Provision (credit) for loan losses | 5,919 | 27,297 | 16,695 | 57,985 | |
| Ending balance | 319,068 | 334,979 | 319,068 | 334,979 | 327,426 |
| Residential Mortgage | |||||
| Allowance for loan losses: | |||||
| Beginning balance | 51,700 | 48,906 | 53,529 | 58,895 | 58,895 |
| Loans charged-off | 0 | (46) | 0 | (46) | |
| Charged-off loans recovered | 41 | 37 | 124 | 205 | |
| Net (charge-offs) recoveries | 41 | (9) | 124 | 159 | |
| Provision (credit) for loan losses | (2,836) | (67) | (4,748) | (10,224) | |
| Ending balance | 48,905 | 48,830 | 48,905 | 48,830 | 53,529 |
| Consumer loans | |||||
| Allowance for loan losses: | |||||
| Beginning balance | 21,864 | 22,932 | 21,580 | 22,805 | 22,805 |
| Loans charged-off | (3,354) | (2,213) | (6,617) | (4,353) | |
| Charged-off loans recovered | 1,080 | 773 | 1,509 | 1,616 | |
| Net (charge-offs) recoveries | (2,274) | (1,440) | (5,108) | (2,737) | |
| Provision (credit) for loan losses | 4,127 | 784 | 7,245 | 2,208 | |
| Ending balance | $ 23,717 | $ 22,276 | $ 23,717 | $ 22,276 | $ 21,580 |